US3690727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust suppressing during mining process
Assignee: Honeywell International Inc
•
Filing: 1970-10-13
•
Granted: 1972-09-12
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Expires: 1990-10-13
Abstract
Abstract Dilatant compositions comprising aqueous solutions containing 0.5 to 6.0 weight percent alkali metal borate and 0.5 to 6.0 weight percent water soluble polyvinyl alcohol are effective dust suppressants and collectors.
Inventors
- 👤 Edward R Degginger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:14
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06; B01D53/00; B01D53/34; B01D47/02; B01D47/021
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
12 words
A process in accordance with claim 1 wherein said substrate is coal.
Claim 2
Dependent Claim
13 words
A process in accordance with claim 1 wherein said mechanical operation is machining.
Claim 3
Dependent Claim
28 words
A process in accordance with claim 1 wherein said dilatant solution contains as an additional component 0.5 to 10 weight percent of a C2 to C12 polyhydric alcohol.
Claim 4
Dependent Claim
44 words
A process in accordance with claim 1 wherein said dilatant solution is formed by emitting from a dispensing mechanism converging streams of aqueous polyvinyl alcohol solution and aqueous alkali metal borate solution, said convergence being achieved exterior to said dispensing mechanism for said streams.
Claim 5
Dependent Claim
76 words
A process for suppressing dust formation in a coal mine shaft prior to effecting an explosion in said shaft comprising applying to the shaft walls at and contiguous to the point of said explosion an aqueous dilatant solution containing from about 0.5 to 6.0 weight percent alkali metal borate and from about 0.5 to 6.0 weight percent water soluble polyvinyl alcohol whereby said dilatant solution forms a tacky coating adherent towards coal dust particles impinging thereon.
Claim 6
Dependent Claim
28 words
A process in accordance with claim 6 wherein said dilatant solution contains as an additional component 0.5 to 10 weight percent of a C2 to C12 polyhydric alcohol.
Claim 7
Dependent Claim
44 words
A process in accordance with claim 6 wherein said dilatant solution is formed by emitting from a dispensing mechanism converging streams of aqueous polyvinyl alcohol solution and aqueous alkali metal borate solution, said convergence being achieved exterior to said dispensing mechanism for said streams.
Claim 8
Dependent Claim
68 words
A process for reducing the tendency of water insoluble finely particulate matter to become suspended in the atmosphere comprising applying to the surface of said particulate matter an aQueous dilatent solution containing from about 0.5 to about 6.0 weight percent alkali metal borate and from about 0.5 to 6.0 weight percent water soluble polyvinyl alcohol whereby said dilatant solution forms a tacky coating adherent towards said particulate matter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |